Been listening to a lot of fast jazz guys recently (like Jeff Andrews for example) and getting inspired to focus a bit more on my 16th note technique. These guys are firing off complex 16th note sequences at around 135bpm, in some cases on just a 4 string p-bass, nothing fancy, and they're digging in hard, no shortcuts or polite string stroking. I know this has been covered endlessly, so I'm hoping for some new ideas. I know most of the accepted 'traditional' approaches for increasing speed: - transcribe and learn solos - start slow and work your way up, focus on clean notes - play closer to the bridge - play with a lighter touch (although does not apply in this case) - floating thumb / moving anchor - low action / good setup etc This is how I've been practicing ever since I began playing something like 9 years ago. These techniques do work, but only up to a point. I notice that on complex 16th note runs - ie not just a quick 16th note bar here and there), I hit a wall around 108bpm, and after that things get sloppy. So are there any other techniques or interesting new approaches for increasing speed other than the stuff above we all already know about? Or is it just a case of carrying on patiently? Have I hit a brick wall, or is it just a plateau?